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Auto-size kernel page tables allocation on Marvell systems.

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This allows mini dumps to fully work for these platforms.

Obtained from:	Juniper Networks, Semihalf
This commit is contained in:
Rafal Jaworowski 2008-11-06 16:25:12 +00:00
parent 8e321b7943
commit 71f00bea66
1 changed files with 9 additions and 11 deletions
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20
sys/arm/mv/mv_machdep.c
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@ -93,9 +93,6 @@ __FBSDID("$FreeBSD$");
#define debugf(fmt, args...)
#endif
#define KERNEL_PT_SYS 0 /* Page table for mapping proc0 zero page */
#define KERNEL_PT_KERN 1
/*
* This is the number of L2 page tables required for covering max
* (hypothetical) memsize of 4GB and all kernel mappings (vectors, msgbuf,
@ -366,7 +363,7 @@ initarm(void *mdp, void *unused __unused)
struct bi_mem_region *mr;
void *kmdp;
u_int l1pagetable;
int i = 0;
int i = 0, j = 0;
kmdp = NULL;
lastaddr = 0;
@ -465,13 +462,14 @@ initarm(void *mdp, void *unused __unused)
if (!(i % (PAGE_SIZE / L2_TABLE_SIZE_REAL))) {
valloc_pages(kernel_pt_table[i],
L2_TABLE_SIZE / PAGE_SIZE);
j = i;
} else {
kernel_pt_table[i].pv_va = freemempos -
(i % (PAGE_SIZE / L2_TABLE_SIZE_REAL)) *
L2_TABLE_SIZE_REAL;
kernel_pt_table[i].pv_va = kernel_pt_table[j].pv_va +
L2_TABLE_SIZE_REAL * (i - j);
kernel_pt_table[i].pv_pa =
kernel_pt_table[i].pv_va - KERNVIRTADDR +
KERNPHYSADDR;
}
}
/*
@ -506,7 +504,7 @@ initarm(void *mdp, void *unused __unused)
l2_start = lastaddr & ~(L1_S_OFFSET);
for (i = 0 ; i < l2size - 1; i++)
pmap_link_l2pt(l1pagetable, l2_start + i * L1_S_SIZE,
&kernel_pt_table[KERNEL_PT_KERN + i]);
&kernel_pt_table[i]);
pmap_curmaxkvaddr = l2_start + (l2size - 1) * L1_S_SIZE;
@ -532,7 +530,7 @@ initarm(void *mdp, void *unused __unused)
/* Link and map the vector page */
pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH,
&kernel_pt_table[KERNEL_PT_SYS]);
&kernel_pt_table[l2size - 1]);
pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa,
VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
@ -603,8 +601,8 @@ initarm(void *mdp, void *unused __unused)
arm_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL);
dump_avail[0] = KERNPHYSADDR;
dump_avail[1] = KERNPHYSADDR + memsize;
dump_avail[0] = 0;
dump_avail[1] = memsize;
dump_avail[2] = 0;
dump_avail[3] = 0;